Hercules - Hercules is a collaborative software development project revolving around the creation of a robust massively multiplayer online role playing game (MMORPG) server package. Written in C, the program is very versatile and provides NPCs, warps and modifications. The project is jointly managed by a group of volunteers located around the world as well as a tremendous community providing QA and support. Hercules is a continuation of the original Athena project.

mongoose - Mongoose Embedded Web Server Library - Mongoose is more than an embedded webserver. It is a multi-protocol embedded networking library with functions including TCP, HTTP client and server, WebSocket client and server, MQTT client and broker and much more.

C#

NoahGameFrame - A fast, scalable, distributed game server framework for C++, include actor library, network library,can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal. https://github.com/ketoo/NFClient

OpenRA - Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

Minimal-Bitcoin-Miner - A very simple, fully functional CPU based Bitcoin Miner in C#. Uses the GETWORK protocol to connect to pool. A great reference implementation if you are trying to understand how Bitcoin mining works. (Edit 2017: Not actually fit for mining - the GETWORK protocol isn’t supported anymore by most pools)

minerva - Minerva: a fast and flexible tool for deep learning on multi-GPU. It provides ndarray programming interface, just like Numpy. Python bindings and C++ bindings are both available. The resulting code can be run on CPU or GPU. Multi-GPU support is very easy.

AwesomeBump - AwesomeBump is a free program written using Qt library designed to generate normal, height, specular or ambient occlusion textures from a single image. Since the image processing is done in 99% on GPU the program runs very fast and all the parameters can be changed in real time. AB was made to be a new alternative to known gimp plugin called Insane Bump.

open-source-search-engine - A distributed open source search engine and spider/crawler written in C/C++ for Linux on Intel/AMD. From gigablast dot com, which has binaries for download. See the README.md file at the very bottom of this page for instructions.

awesome-selfhosted - This is a list of Free Software network services and web applications which can be hosted locally. Selfhosting is the process of locally hosting and managing applications instead of renting from SaaS providers.

ViewDeck - An implementation of the sliding menu found in various iOS apps.

PKRevealController - PKRevealController is a delightful view controller container for iOS, enabling you to present multiple controllers on top of one another.

BButton - BButton is a subclass of UIButton that looks like the bootstrap buttons.

SVPullToRefresh - Give pull-to-refresh & infinite scrolling to any UIScrollView with 1 line of code.

PrettyKit - PrettyKit for iOS is a small set of new widgets and UIKit subclasses that gives you a deeper UIKit customization. You will be able to change their background color, add gradients, shadows, etc.

php-mpos - MPOS stands for Mining Portal Open Source. A unified mining interface for various Scrypt and SHA256d Crypto-currencies! Please be aware that the Issue tracker on Github is a Bug Tracker, not a Support Forum!

buildstatic - build Swift modules as static libraries, include them about as easily as normal frameworks. [• STATUS: still working last time I checked but possibly a bit outdated – should hopefully be fully obsolete when there’s more Swift Package Manager + Xcode integration •]